1336 PLUS II Custom Firmware

Transcription

1 Instructions 1336 PLUS II Custom Firmware EN921 - Variable Voltage w/ PI Power/Current Control! ATTENTION: This Custom Firmware has been designed for a specific application and differs from the standard 1336 PLUS II product offering. It must be installed and run only under this custom application. Attempting to run this Custom Firmware under any other type of application or condition could result in unpredictable and/or hazardous conditions. Description Custom Firmware EN921 differs from the standard 1336 PLUS II version firmware as follows: Drive parameters have been added to allow the drive output voltage to be controlled independently of the commanded output frequency. All voltage parameters are accessed from the new Voltage Control parameter group following the Motor Control group. A new Voltage PI (proportional-integral) parameter group has been added to allow the dynamic adjustment of output voltage from a reference and feedback signal error calculation. All Process PI functionality (PI regulation of output frequency) available in the standard firmware has been removed in this custom firmware. Voltage Control This group of parameters are used to independently control drive output voltage. [Control Select] Selects the motor control method for the drive. The default setting provides full stator flux control that is suitable for most applications. [Minimum Voltage] This parameter sets the lowest voltage the drive will output when [Control Select] is set to Variable Voltage. [Maximum Voltage] This parameter sets the highest voltage the drive will output. Parameter Number 9 Sens Vector Economize 0 Stator Flux control with Economize Sens Vector 1 Stator Flux control Fixed Boost 2 V/Hz w/programmed accel/run boost Full Custom 3 V/Hz with full configuration Variable Voltage 4 Independent voltage/freq control (new selection) Parameter Number % of Drive Rated Voltage Parameter Number 20 Drive Rated Volts 120% of Drive Rated Voltage

2 2 EN921 - Variable Voltage w/ PI Power/Current Control Voltage Control [Volt Incr Time] This value determines the time it will take the drive to ramp from to [Maximum Voltage] when [Control Select] is set to Variable Voltage. The rate determined by this value and [Maximum Voltage] is linear. [Volt Decr Time] This value determines the time it will take the drive to ramp from [Maximum Voltage] to when [Control Select] is set to Variable Voltage. The rate determined by this value and [Maximum Voltage] is linear. [Voltage Command] This parameter displays the commanded voltage value from the reference specified by [Volt Select]. [Volt Select] This parameter specifies which input signal will be used as the [Volt Command] reference when [Control Select] is set to Variable Voltage. [Volt Preset] This parameter specifies the output voltage setpoint value when [Volt Select] is set to Volt Preset. [Volt Trim Select] This parameter specifies which input signal will be used to trim (increase/decrease) the [Volt Command] reference. Volt trim is only active when [Volt Trim%] is set to a non-zero value. Parameter Number Second / Seconds x Sec 0.0 Sec Sec Parameter Number Second / Seconds x Sec 0.0 Sec Sec Parameter Number % Rated Drive Output Voltage Parameter Number 337 Volt Preset Voltage PI 11 Refer to Voltage PI Group Parameter Number(s) % Drive Rated Volts Parameter Number 339 Analog In 1

3 EN921 - Variable Voltage w/ PI Power/Current Control 3 Voltage Control [Volt Trim%] This parameter specifies the voltage trim percentage added/deducted from the [Voltage Command] reference. The value represents ±Volt Trim% of drive [Rated Voltage]. Minimum Input = Volt Trim% Value Mid-Point Input = No Trim Maximum Input = +Volt Trim% Value The volt trim signal can be inverted by entering a negative value. [Volt Command Ref] This parameter specifies the drive output voltage when [Volt Select] is set to Volt Cmd Ref. The parameter value is cleared at power-up and is not retained in EEPROM storage. This parameter can be be linked with a SCANport communications adapter via the [Data In xx] Adapter I/O parameters. Parameter Number 340 1% / 4096 = 100% 0% -100% +100% Parameter Number(s) % Drive Rated Volts

4 4 EN921 - Variable Voltage w/ PI Power/Current Control Voltage PI This group of parameters configures the Voltage PI Regulator. Note: The Process PI parameter group has been eliminated in this custom firmware. pi reference PI Reference Select Integral Term = 0 PI Feedback Select pi feedback PI Config.sqrt_fdbk PI Reference PI Feedback + 1 Σ PI Config.inv_error PI Error Process KI s + PI Config.reset_int Σ + PI Pos Limit PI Voltage Reference Process KP PI Neg Limit PI Output PI Enable Output Voltage 0 0 Volt Incr/Decr Time PI Config.zero_clamp [Volt Select] This parameter specifies which input signal will be used as the [Volt Command] reference when [Control Select] is set to Variable Voltage. [PI Config] This parameter sets and displays the configuration for the PI regulator. Note: Reset Integrator (Int) is also available through a digital input. Parameter Number 337 Volt Preset Pre+AI0 Trim 11 Refer to [Volt Trim%] Value Pre+AI1 Trim 12 Pre+AI2 Trim 13 Pre+Trim Ref 14 Refer to [Volt Trim% Ref] Value Voltage PI 15 Voltage PI Control (new selection) Parameter Number Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Inv Error - Changes sign of PI Error Reset Int - Holds KI at zero Zero Clamp - Prevents bidirectional operation Sqrt Fdbk - Uses sq. root of PI feedback value Set Output Preload Int PI Enable Diagram Bypass - Set PI Output equal to PI Ref (Refer to Diagrams on next page)

5 EN921 - Variable Voltage w/ PI Power/Current Control 5 Voltage PI Output Volts Command Diagram 1 Diagram 2 Preload Preload Feed forward effect for more dynamic response Diagram 3 Preload at Start Preload at Start Better response for well defined systems PI Output Preload Preload Time Enable Disable Enable Disable Enable Disable Enable PI output integrates from zero drive ramps to regulated voltage. Disable PI output is forced to zero drive ramps to unregulated voltage. Enable PI output steps to preload and integrates from there drive steps to preload and ramps from there. Disable PI output is forced to zero - drive ramps to unregulated voltage. Enable PI output integrates from preload drive ramps from preload. Disable PI output is held at preload - drive ramps to unregulated voltage (min. preload). Note: Drive will step output equal to preload on start. [PI Status] This parameter displays the status of the Process PI regulator. Parameter Number 214 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Enabled Spares [PI Ref Select] The source of the PI reference is selected with this parameter. The value from the selected reference is the set point for the Process PI regulator. [PI Fdbk Select] The source of the PI feedback is selected with this parameter. It identifies the input point for the process feedback device. [PI Reference] This parameter displays the current value of the reference selected by [PI Ref Select]. Parameter Number 215 Volt Preset %Power Ref 11 %Current Ref 12 Parameter Number 216 Analog In 1 %Power Ref 11 %Current Ref 12 Parameter Number 217 / 4096 = 100%

6 6 EN921 - Variable Voltage w/ PI Power/Current Control Voltage PI [PI Feedback] This parameter displays the current value of the reference selected by [PI Fdbk Select]. [PI Error] The value of the error calculated by the PI loop. This value is the difference between [PI Reference] & [PI Feedback] and determines the PI output. [PI Output] The current output of the PI loop is displayed with this parameter. This output is used as the reference for the voltage output. [KI Process] This parameter sets the integral gain of the process PI loop. [KP Process] This parameter sets the proportional gain of the process PI loop. [PI Neg Limit] This parameter sets the lower (negative) limit of the PI output. [PI Pos Limit] This parameter sets the upper (positive) limit of the PI output. [PI Preload] Sets the value used to preload the PI integrator when Set Output or Preload Int bits equal 1 in [PI Config]. Parameter Number 218 / 4096 = 100% Parameter Number 219 / 4096 = 100% Parameter Number % Rated Voltage 120% Rated Voltage Parameter Number 221 NA / NA Parameter Number 222 NA / NA Parameter Number 223 / 4096 = 100% Parameter Number 224 / 4096 = 100% Parameter Number 225 / 4096 = 100%

7 EN921 - Variable Voltage w/ PI Power/Current Control 7 Voltage PI [Pwr / Cur Ref Lo] Sets the percentage of power or current reference that represents the low end of the Range. [Pwr / Cur Ref Hi] Sets the percentage of power or current reference that represents the high end of the Range. Parameter Number % / 4096 = 100% 0.0% 300.0% % Parameter Number % / 4096 = 100% 100.0% 300.0% % [PWM Frequency] This parameter sets the carrier frequency for the sine coded PWM output waveform. This parameter cannot be changed while the drive is running. Refer to the Derating Guidelines in Appendix A. The following parameter(s) have been modified to provide special functionality required by the application (changes indicated in bold): Parameter Number 45 2 KHz / KHz/2 2 KHz 1 KHz A & B Frame Drives = 8 khz C Frame Drives & Up = 6 khz [VT Scaling] This parameter scales the drive for VT ampere ratings. Important: This parameter must be set to Disabled when drive is used in a fibers application. This parameter cannot be changed while the drive is running. [Load Loss Level] Sets the torque current level below which a load loss fault/ warning will occur. The value is expressed as a percentage of programmed [Motor NP Amps]. Parameter Number 203 Enabled Disabled 0 Disables Variable Torque Scaling Enabled 1 Enables Variable Torque Scaling Parameter Number % / 4096 = 100% 50% 5% 100%

8 Publication 1336F-IN011A-EN-P August, 2003 P/N P01 Copyright 2002 Rockwell Automation. All rights reserved. Printed in USA.